EP3661402B1 - Procédé de fonctionnement d'un appareil d'aspiration et appareil d'aspiration - Google Patents

Procédé de fonctionnement d'un appareil d'aspiration et appareil d'aspiration Download PDF

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Publication number
EP3661402B1
EP3661402B1 EP18750412.1A EP18750412A EP3661402B1 EP 3661402 B1 EP3661402 B1 EP 3661402B1 EP 18750412 A EP18750412 A EP 18750412A EP 3661402 B1 EP3661402 B1 EP 3661402B1
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EP
European Patent Office
Prior art keywords
suction
suction unit
unit
filtering device
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18750412.1A
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German (de)
English (en)
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EP3661402A1 (fr
EP3661402C0 (fr
Inventor
Thorsten Langen
Michael Kaiser
Gábor PEFLOF
Jürgen STEINBACH
Heiko Stöcker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE and Co KG
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Publication of EP3661402A1 publication Critical patent/EP3661402A1/fr
Application granted granted Critical
Publication of EP3661402B1 publication Critical patent/EP3661402B1/fr
Publication of EP3661402C0 publication Critical patent/EP3661402C0/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2889—Safety or protection devices or systems, e.g. for prevention of motor over-heating or for protection of the user
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/36—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back
    • A47L5/365—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back of the vertical type, e.g. tank or bucket type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles
    • A47L9/1409—Rigid filtering receptacles
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles
    • A47L9/1427—Means for mounting or attaching bags or filtering receptacles in suction cleaners; Adapters
    • A47L9/1472—Means for mounting or attaching bags or filtering receptacles in suction cleaners; Adapters combined with security means, e.g. for preventing use, e.g. in case of absence of the bag
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/19—Means for monitoring filtering operation
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2805—Parameters or conditions being sensed
    • A47L9/2821—Pressure, vacuum level or airflow
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
    • A47L9/2842—Suction motors or blowers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
    • B01D46/0086—Filter condition indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/444—Auxiliary equipment or operation thereof controlling filtration by flow measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/55—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for cleaning appliances, e.g. suction cleaners

Definitions

  • the invention relates to a method for operating a suction device which comprises a suction unit and a removable filter device, wherein the suction unit generates a suction flow which flows through the filter device when it is arranged on the suction device, in which method, after commissioning of the suction unit, it is checked whether the filter device is present, and if it is then detected that the filter device is not present, the suction unit is switched off, wherein an evaluation unit uses test data and determines from this whether a switch-off signal for the suction unit should be generated or not.
  • the invention further relates to a suction device comprising a suction unit and a removable filter device, wherein the suction unit generates a suction flow which flows through the filter device when the filter device is arranged on the suction device, a pressure sensor device which is arranged between the filter device and the suction unit and provides pressure measurement values on the suction flow downstream of the filter device and upstream of the suction unit, and an evaluation unit which, after commissioning of the suction unit, determines on the basis of the measurement data of the pressure sensor device whether the filter device is inserted or not, and upon detection of a missing filter device, generates a switch-off signal for the suction unit.
  • the US$4,733,430 reveals a vacuum cleaner with a dust bag sensor.
  • the US$4,733,431 also reveals a vacuum cleaner with a dust bag sensor.
  • the EP 2 636 351 A1 discloses a robot vacuum cleaner with a detection unit for a filter.
  • a vacuum cleaner with a receiving space for a main filter with a pressure sensor system for detecting a variable which characterises a negative pressure in a first area lying downstream of the receiving space in the direction of suction flow, with a detection unit which detects, depending on the detected variable, whether a main filter is inserted, and with a control unit which prevents the vacuum cleaner from being started up and/or outputs heat information to an operator of the vacuum cleaner if it is detected that no Main filter is inserted, is known.
  • the pressure sensor system comprises at least one pressure switch, which transmits an output signal to the detection unit when the negative pressure in the first region is above a predeterminable negative pressure threshold, and the detection unit detects that no main filter is inserted if no output signal is received from the pressure switch.
  • the US 2007/0283521 A1 discloses a programmable control unit for a vacuum cleaner system.
  • the US 2007/0163075 A1 reveals a vacuum cleaner.
  • the JP 03168117 A reveals a vacuum cleaner with an automatic stop function.
  • the DE 10 2011 052 020 A1 discloses a vacuum cleaner with a means for detecting a measure of a volume flow generated during operation and/or with a means for detecting a measure of a negative pressure generated during operation, wherein a drive unit control comprises means for comparing the detected volume flow and a predetermined or predeterminable upper volume flow limit and/or means for comparing the detected negative pressure and a predetermined or predeterminable negative pressure limit, and the drive unit control comprises or controls means for reducing the electrical power consumption depending on the result of the comparison.
  • the invention is based on the object of providing a method of the type mentioned at the outset with which the suction device can be operated in a safe manner.
  • the evaluation unit uses an algorithm or a table to make a decision regarding switching off from the test data of the suction unit, and that the table contains at least one threshold value or the algorithm determines at least one threshold value, wherein the at least one threshold value is a threshold value for switching off the suction unit.
  • a filter system installed on the vacuum cleaner prevents sucked-in dust from being blown out into the environment.
  • the filter system can become clogged with dust particles.
  • the suction operation can be significantly restricted because the full suction power is no longer available due to the lack of sealing by the filter device (due to the drawing in of false air).
  • the corresponding test device By testing after commissioning the suction unit, the corresponding test device can be implemented in a structurally simple manner. The number of required components can be kept to a minimum. In particular, existing components can be used for testing. The filter system does not need to be modified.
  • An evaluation unit which uses test data to determine whether or not a shutdown signal should be generated for the suction unit. This makes it easy to perform a detection test for the filter device.
  • the test data includes, in particular, pressure measurements on a suction line between the filter device and the suction unit. Furthermore, an electrical voltage of a power source for the suction unit can also be taken into account. It is also possible, for example, to further consider the electrical power consumption of the suction unit.
  • the evaluation unit uses an algorithm or a table to make a decision regarding shutting down the suction unit based on the test data. This allows the corresponding test procedure to be implemented easily.
  • the number of hardware components (such as switches and cables) can be kept to a minimum.
  • the table contains at least one threshold value, or the algorithm determines at least one threshold value, wherein the at least one threshold value is a threshold value for shutting down the suction unit, and in particular is a pressure value, wherein shutting down the suction unit preferably occurs when the absolute pressure value is too high relative to the threshold value.
  • An absolute pressure value that is too high or a pressure difference that is too small relative to the ambient pressure is an indication of a missing filter device.
  • This specific time interval is determined so that stable values can be established for testing, and in particular, stable pressure values can be established.
  • the time interval is chosen to be at least long enough for these stable values to be established, and is preferably chosen to be short enough to minimize the start-up time of the suction device in relation to the detection of a missing filter device.
  • the specific time interval should be at least 2.5 s, preferably at least 3 s, and in particular at least 3.5 s.
  • this specific time interval is 4 s or 5 s.
  • the specific time interval is also at least approximately the time interval that represents the maximum operating time of the suction unit when a missing filter device is detected.
  • test is based on measured pressure values in the suction flow between the filter device and the suction unit. These measured pressure values can be used to detect the presence or absence of the filter device.
  • the pressure measurements are determined at one or more points relative to the suction flow above a holder for the filter device, whereby these points are located above the filter device when the filter device is inserted on the holder.
  • the corresponding measurement is carried out on a suction line which connects the filter device to the suction unit in a flow-effective manner relative to the suction flow.
  • the point or points at which pressure measurements are determined are outside the area affected by a cleaning device for the filter device.
  • a clogged filter can be cleaned via the cleaning device, such as an external air valve device, in order to achieve improved To achieve flowability.
  • the evaluation unit is connected to a control system for the suction unit or is part of this control system. This results in a simple design.
  • the evaluation unit is implemented, at least for the most part, in software within the control system.
  • the evaluation unit uses an algorithm or a table to make a decision regarding shutting down the suction unit based on the test data. This allows the corresponding test procedure to be implemented easily.
  • the table contains at least one threshold value or the algorithm determines at least one threshold value, wherein the at least one threshold value is a threshold value for shutting down the suction unit, and in particular is a pressure value, wherein shutting down the suction unit preferably occurs when the absolute pressure value is too high relative to the threshold value.
  • An absolute pressure value that is too high or a pressure difference that is too small relative to the ambient pressure is an indication of a missing filter device.
  • the table includes threshold values for different electrical voltages of an (electrical) energy source for the suction unit, or if the algorithm determines threshold values for such different electrical voltages. It has been shown that this can also detect voltage fluctuations in a power grid, for example, so that such voltage fluctuations do not affect filter detection.
  • the table includes threshold values for different power consumptions of the suction unit, or if the algorithm includes such threshold values for different power consumptions of the suction unit, or if the algorithm determines such threshold values for different power consumptions of the suction unit, and in particular, a classification is made based on a minimum power consumption and maximum power consumption of the suction unit.
  • a classification is made based on a minimum power consumption and maximum power consumption of the suction unit.
  • threshold values are determined from measurements in which suction hoses of different diameters are connected to the suction device and pressure readings are taken with and without the filter device in place. A threshold value with a "lowest common denominator" is then determined from these measured values.
  • threshold values For the same reason, it is advantageous to use different power consumptions for the suction unit when determining the threshold values, and in particular to use a minimum power consumption and a maximum power consumption. This results in threshold values that can be dependent, at least to some extent, on the power consumption.
  • an installed filter device has a sealing function at a transition to a dirt collection container. This affects the threshold value. If the filter device is missing, leakage currents, etc., can occur. This results in a reduced negative pressure in the suction flow compared to an installed filter device, or the absolute pressure value is closer to the ambient pressure.
  • the evaluation unit can initiate measures based on the acquired test data if the presence of a filter device is detected. If the presence of a filter device is detected, the suction unit can continue to operate. Such measures can then include: initiating cleaning of the filter device by a cleaning device and/or generating a maintenance signal if a threshold value for a volume flow is undershot. If, for example, a pressure curve is measured over time, clogging of the filter device with dust particles can be detected over time. The filter can then be cleaned as needed, for example when a threshold value is reached. Furthermore, a maintenance signal can be generated, for example, which indicates another problem, such as blockage of the suction hose, if a threshold value for a volume flow is undershot; this can generally be determined from the pressure measurements.
  • the evaluation unit comprises a memory device which stores threshold values or data for an algorithm for threshold values, the threshold values being threshold values for switching off the suction unit.
  • This suction device has the advantages already explained in connection with the method according to the invention.
  • the evaluation unit includes a timer that ensures that a shutdown signal only becomes effective after a specific time interval has elapsed after the suction unit has been started up.
  • This specific time interval is stored in the evaluation unit and is preferably determined or set at the factory.
  • the evaluation unit includes a memory device that stores threshold values or data for a threshold value algorithm, where the threshold values are, in particular, pressure values. This allows for simple filter detection. The number of hardware components can be kept to a minimum. In particular, no pressure switch with corresponding lines is required. A significant portion of the detection can be implemented using software.
  • the evaluation unit includes a device for detecting the electrical voltage at an electrical power source for the suction unit. This allows, for example, voltage fluctuations in a public power grid to be taken into account, and filter detection can be carried out reliably despite such possible fluctuations.
  • the evaluation unit may include a device for determining the power consumption of the suction unit and, in particular, for dividing the power consumption into a maximum power consumption or a minimum power consumption. This results in a reliable detection result.
  • the evaluation unit is connected to a control system of the suction device (which also serves as a control system for the suction unit) or is part of this control system. This allows the check for the presence of the filter device to be integrated into the control system of the suction device.
  • the suction device according to the invention can be used to carry out the method according to the invention or the method according to the invention can be carried out on the suction device according to the invention.
  • a vacuum cleaner 10 is a stand-alone vacuum cleaner.
  • This vacuum cleaner 10 has a dirt collection container 12. It is provided that the dirt collection container 12, and thus the vacuum cleaner 10 as a whole, can be mounted on a base via a caster 14 and a wheel assembly 16.
  • a detachable suction head 18 is mounted on the dirt collection container 12.
  • a suction inlet 20 is arranged on the dirt collection container 12.
  • the suction inlet 20 is arranged on the suction head 18.
  • a suction hose 22 can be connected to this suction inlet 20; when the vacuum cleaner 10 is in suction mode, the material to be sucked in is sucked in via a connected suction hose 22 (which may also have a nozzle attached).
  • the suction head 18 when attached to the dirt collection container 12, seals the top of the container. It has a suction outlet 24, at which a filter device 26 with (at least) one filter is positioned on a filter holder 27.
  • the filter holder 27 is designed, for example, as a surrounding element or as a base plate.
  • the filter device 26 is connected to (at least) one suction line 28.
  • the suction line 28 leads to a suction unit 30.
  • the suction unit 30 comprises a blower device 32 with (at least) one blower wheel and a drive motor 34 for motor-driven driving of the blower wheel of the blower device 32.
  • the drive motor 34 is, in particular, an electric motor, such as a universal motor.
  • the suction line 28 and the suction unit 30 are arranged in the suction head 18.
  • the filter device 26 is arranged in the suction head 18.
  • the filter device 26 it is also possible for the filter device 26 to be arranged on the dirt collecting container 12.
  • the suction unit 30 generates a suction flow via the blower device 32, which is fed via the suction line 28 to the dirt collection container 12 and acts on the suction inlet 20.
  • the filter device 26 is flowed through by the suction flow during suction flow operation of the vacuum cleaner 10. Under the effect of the suction flow, air laden with dirt particles enters the dirt collection container 12 via the suction inlet 20, and the particles can be collected in the dirt collection container 12.
  • the filter device 26 filters out dirt particles. Accordingly, it has a dirty side 36, which faces the dirt collection container 12, and a clean side 38, to which the suction line 28 is connected.
  • a cleaning device 40 is assigned to the filter device 26.
  • the cleaning device 40 is arranged in the suction head 18 such that it can act upon the filter device 26 for a cleaning process. Solid particles accumulate on the filter of the filter device 26. Such solid particles can be removed via the cleaning device 40 in order to improve the filtering effect of the filter device 26.
  • the cleaning device 40 is an external air valve device which applies air blasts to the filter device 26 in order to achieve a cleaning effect.
  • the filter device 26 can generally be removed from the filter holder 72 and thus from the suction device 10 in order to enable, for example, a filter replacement.
  • the filter device 26 is inserted into the suction device 10, that is to say in the described embodiment it is inserted into the suction head 18, and the suction head 18 is positioned on the dirt collecting container 12 and in particular is locked thereto, then the filter device 26 a sealing function; the suction flow can only flow through the filter material of the filter of the filter device 26 from the dirt collecting container 12 into the suction line 28.
  • At least one pressure sensor 42 of a pressure sensor device is arranged on the suction line 28 between the filter device 26 and the blower device 32. This pressure sensor 42 can measure the pressure in the suction flow downstream of the filter device 26. The prevailing pressure in the suction line 28 can be determined.
  • the pressure sensor 42 is arranged such that it is not located in an area where the cleaning device 40 acts on the filter device 26. If, for example, the cleaning device 40 is an external air valve device, then the pressure sensor 42 is preferably arranged such that it is at least not directly acted upon by air blasts from the cleaning device 40.
  • the suction device 10 has a controller 44 that controls the operation of the suction device 10.
  • This controller 44 comprises one or more circuit boards on which electronic elements are arranged.
  • the controller 44 is positioned in particular in the suction head 18.
  • the suction device 10 can be operated without the filter device 26. However, this results in sucked-in solid particles being blown back into the environment. Furthermore, relatively large quantities of solid particles can enter the suction line 28 and the blower device 32 and cause damage. Operating the suction device 10 without the filter device 26 is particularly critical when working with hazardous dust.
  • the suction device 10 automatically detects whether a filter device 26 is used or not, and in the case of Detection of a missing filter device 26 prevents (permanent) operation of the suction device 10.
  • the controller 44 comprises an evaluation unit 46 ( Figure 2 ).
  • the evaluation unit 46 is particularly integrated into the controller 44.
  • evaluation unit 46 it is also possible for the evaluation unit 46 to be spaced apart from the controller 44 and to cooperate with the controller 44 in terms of signal effectiveness.
  • the evaluation unit 46 includes a corresponding (input) interface 48 for this purpose.
  • a testing device 50 of the evaluation unit 46 checks for the presence or absence of the filter device 26 based on the available data.
  • the testing device 50 uses one or more algorithms or accesses a table stored in a storage device 52.
  • the evaluation unit 46 further comprises an (output) interface 54.
  • This interface 54 directly or indirectly controls, in particular, the suction unit 30 and thereby the drive motor 34.
  • the interface 54 generates a corresponding shutdown signal, which is transmitted to a switch 56 (in particular to the controller 44) in order to be able to shut down the suction unit 30 upon detection of a missing filter device 26.
  • the pressure sensor 42 of the pressure sensor device provides its measured values to the evaluation unit 46. Based on the measured pressure values, the evaluation unit 46 then checks for the presence or absence of the filter device 46.
  • the drive motor 34 is supplied with electrical energy via an electrical energy source 58. Voltage fluctuations can generally occur at the electrical energy source 58.
  • the primary electrical energy source 58 is, for example, a public power grid. Voltage fluctuations can occur in such a public power grid. It has been shown that such voltage fluctuations can generally have an impact.
  • the evaluation unit 56 comprises a determination device 60 for this electrical voltage in order to be able to take into account any deviations from a nominal voltage (such as 230 V).
  • the determination device 60 determines the actual voltage acting, in particular for the drive motor 34.
  • the evaluation unit 46 comprises a determination device 62 for a corresponding power consumption P.
  • the electrical power consumption is divided into specific ranges, and in particular into a minimum power consumption at which suction operation is still possible, and a maximum power consumption.
  • the maximum power consumption is the maximum power that the blower device 32 can draw with an open reference suction hose of a certain length and diameter.
  • the evaluation unit 46 comprises a timer 64. This timer 64 measures the time that has elapsed since the start-up of the suction unit 30. It has been shown that a certain time interval must be waited for before test results can be determined or test results can be used meaningfully to switch off the suction unit 30 again if necessary.
  • this specific time interval is predetermined. It is, for example, at least 2.5 s, preferably at least 3 s, and particularly preferably at least 3.5 s. In a specific embodiment, this specific time interval is 4 s or 5 s.
  • the method according to the invention for operating the suction device 10 and for detecting whether the filter device 26 is present or not works as follows:
  • the suction unit 30 is activated.
  • a suction flow is generated, which, via the suction line 28, pressurizes the dirt collection container 12, the suction inlet 20, and a suction hose 22 connected thereto.
  • the test is performed, whereby the specified time interval is waited for before the test is performed or the test results are used, in particular, to shut down the suction unit 30 (if a missing filter device 26 is detected).
  • the timer 64 checks whether this specified time interval has already expired or not.
  • the measured values of the pressure sensor 42 are used for testing.
  • a check is performed to determine whether the pressure falls below a certain threshold.
  • This pressure threshold can, in principle, be calculated using one or more algorithms, or it can be stored in a table, particularly in the memory device 52.
  • a pressure is established in the suction line 28 at a specific hose diameter W of the suction hose 22, a predetermined voltage U, and a specific power consumption P, which is approximately constant and can be measured via the pressure sensor 42.
  • This pressure is a negative pressure relative to the ambient pressure.
  • a pressure value is also established which is different from the pressure value when the filter device 26 is present.
  • the absolute pressure value is greater when the filter device 26 is not present than when the filter device 26 is present, since when the filter device 26 is missing, the sealing effect of the filter device 26 on the suction head 18 is missing and bypass channels for false air are therefore open.
  • threshold values are then stored in the memory device 52 in tabular form in their dependence on U and P.
  • the threshold values are previously determined for a specific suction device 10 and stored in the storage device 52 in a table or a corresponding algorithm is provided for this purpose.
  • the pressure values at the pressure sensor 42 for different voltages were measured at different hose diameters W.
  • the filter device 26 was used on the one hand and omitted on the other.
  • the negative pressure mentioned in the table is the pressure difference from the ambient pressure.
  • the absolute pressure is therefore the difference between the ambient pressure and the negative pressure.
  • the different voltage values characterize a nominal voltage (230 V), a large undervoltage, and a large overvoltage. Practical experience has shown that such a categorization is sufficient for mains-operated vacuum cleaners.
  • the threshold values which are stored in particular in tabular form in the storage device 52, are determined in such a way that the hose diameter W is not taken into account, so that they are, to a certain extent, universal for the suction device 10, regardless of the suction hose 22 used.
  • a corresponding threshold table is then generated by using threshold values that apply to all hose diameters W: Table 4: U p T (Max. Power) p T (Min. Power) 207 27 14 230 30 15 254 36 19
  • the pressure p T is the corresponding threshold pressure, which is indicated as negative pressure in the table shown.
  • the corresponding threshold when related to absolute pressure values, is the difference between the ambient pressure and p T .
  • the corresponding threshold values are stored in a table for the maximum power consumption and the minimum power consumption. Furthermore, they are stored for the respective voltage U of the electrical energy source 58, with categorization also taking place here. (It is usually sufficient to divide the voltage U into a few ranges, such as three.)
  • the evaluation unit 46 checks whether a shutdown signal should be generated for the suction unit 30 or not.
  • the specific time interval can be determined, which is used to release test results or to perform the test, which can lead to a shutdown. It can be seen from the table that, for example, a waiting time of approximately 3 seconds is sufficient to achieve stable pressure conditions under all conditions (with filter device 26, without filter device 26, different hose diameters W). If, for example, a safety margin of 1 s or more is added here, then the specific time interval can be set to (at least) 4 s, from which a shutdown signal for the suction unit 30 can generally be generated.
  • Tables 1 to 3 and 5 are "calibration tables" used to determine the necessary parameters (pressure thresholds, specific time intervals for meaningful testing) for the operation of the suction device 10.
  • the values of Table 4 are stored in the memory device 52.
  • the duration determined from the data in Table 5 for the specific The time interval is also stored on the evaluation unit 46 (and there, for example, in the memory device 52).
  • the detection results of the pressure sensor 42 can also be used for other measures (in Figure 2 indicated by the reference numeral 26).
  • measures are, for example, a needs-based filter cleaning of the filter device 26 by appropriate control of the cleaning device 40.
  • a gradual increase in pressure in the suction line 28 increase in absolute pressure, reduction in negative pressure
  • filter cleaning can then be initiated by the cleaning device 40.
  • a volume flow can be derived from the pressure measured values and a maintenance signal can be generated if a threshold value for a volume flow is undershot.
  • a vacuum cleaner 10 is provided in which the presence of the filter device 26 can be detected with minimal design effort. This ensures that continued operation is not possible if the filter device 26 is detected as missing. This prevents dust from being blown into the environment by the vacuum cleaner 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electric Vacuum Cleaner (AREA)

Claims (15)

  1. Procédé de fonctionnement d'un appareil d'aspiration (10), qui comprend un groupe d'aspiration (30) et un dispositif de filtration (26) amovible, dans lequel le groupe d'aspiration (30) produit un courant d'aspiration qui traverse le dispositif de filtration (26) lorsqu'il est agencé au niveau de l'appareil d'aspiration (10), au cours duquel une vérification de la présence du dispositif de filtration (26) est mise en œuvre après la mise en service du groupe d'aspiration (30), et s'il est détecté que le dispositif de filtration (26) n'est pas présent, le groupe d'aspiration (30) est désactivé, dans lequel une unité d'évaluation (46) utilise des données de vérification et détermine à partir de celles-ci si un signal de désactivation pour le groupe d'aspiration (30) doit être généré ou non, caractérisé en ce que l'unité d'évaluation (46) utilise un algorithme ou un tableau afin de prendre, à partir des données de vérification, une décision concernant la désactivation du groupe d'aspiration (30), et en ce que le tableau contient au moins une valeur de seuil ou l'algorithme détermine au moins une valeur de seuil, dans lequel la au moins une valeur de seuil est une valeur de seuil pour une désactivation du groupe d'aspiration (30).
  2. Procédé selon la revendication 1, caractérisé en ce qu'un intervalle de temps défini s'écoule après la mise en service du groupe d'aspiration (30) avant que des résultats de vérification ne soient utilisés pour désactiver ou laisser fonctionner le groupe d'aspiration (30), et en particulier
    caractérisé en ce que l'intervalle de temps défini est d'au moins 2,5 s, de préférence d'au moins 3 s, et en particulier d'au moins 3,5 s.
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la vérification concernant la présence du dispositif de filtration (26) est mise en œuvre au niveau du courant d'aspiration.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le fondement de la vérification repose sur des valeurs de pression mesurées au niveau du courant d'aspiration entre le dispositif de filtration (26) et le groupe d'aspiration (30), et en particulier caractérisé par au moins une des caractéristiques ci-dessous :
    - les valeurs de pression sont déterminées à un ou plusieurs emplacement(s) par rapport au courant d'aspiration au-dessus d'un support (27) destiné au dispositif de filtration (26), dans lequel ledit emplacement ou lesdits emplacements est ou sont situé(s) au-dessus du dispositif de filtration (26) lorsque le dispositif de filtration (26) est installé sur le porte-filtre (27) ;
    - le ou les emplacement(s) au niveau duquel ou desquels des valeurs de pression sont déterminées se situe (nt) en dehors d'une région de sollicitation d'un dispositif de nettoyage (40) destiné au dispositif de filtration (26) ;
    - une tension électrique (U) d'une source d'énergie (58) destinée au groupe d'aspiration (30) est en outre utilisée pour la vérification.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité d'évaluation (46) est reliée de manière efficace en termes de signal à une commande (44) destinée au groupe d'aspiration (30) ou fait partie de ladite commande (44).
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la au moins une valeur de seuil est une valeur de pression, dans lequel une désactivation du groupe d'aspiration (30) a lieu en cas de valeur de pression absolue trop élevée par rapport à la valeur de seuil, et en particulier
    caractérisé en ce que le tableau comprend des valeurs de seuil pour différentes tensions électriques (U) d'une source d'énergie (58) destinée au groupe d'aspiration (30) ou en ce que l'algorithme détermine des valeurs de seuil pour lesdites différentes tensions électriques (U).
  7. Procédé selon la revendication 6, caractérisé en ce que le tableau comprend des valeurs de seuil pour différentes puissances absorbées (P) du groupe d'aspiration (30) ou l'algorithme détermine lesdites valeurs de seuil pour différentes puissances (P) du groupe d'aspiration (30), et en particulier une classification est effectuée en fonction d'une puissance absorbée minimale et d'une puissance absorbée maximale du groupe d'aspiration (30).
  8. Procédé selon la revendication 6 ou 7, caractérisé en ce que les valeurs de seuil sont déterminées à partir de mesures pour lesquelles des tuyaux d'aspiration (22) de différents diamètres (W) sont raccordés à l'appareil d'aspiration (10) et des valeurs de mesure de pression sont mesurées avec le dispositif de filtrage (26) inséré et sans le dispositif de filtrage (26) inséré, et en particulier
    caractérisé en ce que différentes tensions électriques (U) d'une source d'énergie (58) destinée au groupe d'aspiration (30) sont utilisées lors de la détermination des valeurs de seuil, et en particulier
    caractérisé en ce que différentes puissances absorbées (P) destinées au groupe d'aspiration (30) sont utilisées lors de la détermination des valeurs de seuil, et en particulier une puissance absorbée minimale et une puissance absorbée maximale sont utilisées.
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un dispositif de filtration (26) inséré présente une fonction d'étanchéité au niveau d'une transition vers un réservoir collecteur de saletés (12).
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité d'évaluation (46) lance des étapes à partir des données de vérification déterminées lorsque la présence d'un dispositif de filtration (26) est détectée, dans lequel lesdites étapes peuvent consister à :
    - initier un nettoyage du dispositif de filtration (26) grâce à un dispositif de nettoyage (40) et/ou
    - générer un signal de maintenance lorsqu'une valeur de seuil pour un débit volumétrique est dépassée.
  11. Appareil d'aspiration, comprenant un groupe d'aspiration (30) et un dispositif de filtration (26) amovible, dans lequel le groupe d'aspiration (30) produit un courant d'aspiration qui traverse le dispositif de filtration (26) lorsque le dispositif de filtration (26) est agencé au niveau de l'appareil d'aspiration (30), un dispositif de détection de pression (42) qui est agencé entre le dispositif de filtration (26) et le groupe d'aspiration (30) et qui fournit des valeurs de mesure de pression au niveau du courant d'aspiration en aval du dispositif de filtration (26) et en amont du groupe d'aspiration (30), et une unité d'évaluation (46) qui, après la mise en service du groupe d'aspiration (30) et en se basant sur les données de mesure du dispositif de détection de pression (42), détermine si le dispositif de filtration (26) est utilisé ou non, et qui, en cas de détection d'un dispositif de filtration (26) défectueux, génère un signal de désactivation pour le groupe d'aspiration (30), caractérisé en ce que l'unité d'évaluation (46) comprend un dispositif de stockage (52) qui mémorise des valeurs de seuil ou des données pour un algorithme destiné à des valeurs de seuil, dans lequel les valeurs de seuil sont des valeurs de seuil pour une désactivation du groupe d'aspiration (30).
  12. Appareil d'aspiration selon la revendication 11, caractérisé en ce que l'unité d'évaluation (46) comprend un organe formant horloge (64) qui assure qu'un signal de désactivation ne devient actif qu'après l'écoulement d'un certain intervalle de temps après la mise en service du groupe d'aspiration (30).
  13. Appareil d'aspiration selon la revendication 11 ou 12, caractérisé en ce que les valeurs de seuil sont des valeurs de pression.
  14. Appareil d'aspiration selon l'une quelconque des revendications 11 à 13, caractérisé par au moins une des caractéristiques ci-dessous :
    - l'unité d'évaluation (46) comprend un dispositif de détermination (60) d'une tension électrique (U) d'une source d'énergie électrique (58) destinée au groupe d'aspiration (30) ;
    - l'unité d'évaluation (46) comprend un dispositif de détermination (62) d'une puissance absorbée du groupe d'aspiration (30) et classe en particulier la puissance absorbée (P) en puissance absorbée maximale ou en puissance absorbée minimale ;
    - l'unité d'évaluation (46) est connectée de manière efficace en termes de signal à une commande (44) de l'appareil d'aspiration (10) ou fait partie de ladite commande (44).
  15. Utilisation de l'appareil d'aspiration selon l'une quelconque des revendications 11 à 14 en vue de la mise en œuvre du procédé selon l'une quelconque des revendications 1 à 10, ou utilisation du procédé selon l'une quelconque des revendications 1 à 10 avec l'appareil d'aspiration selon l'une quelconque des revendications 11 à 14.
EP18750412.1A 2017-08-03 2018-08-02 Procédé de fonctionnement d'un appareil d'aspiration et appareil d'aspiration Active EP3661402B1 (fr)

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DE102017117684.5A DE102017117684A1 (de) 2017-08-03 2017-08-03 Verfahren zum Betreiben eines Sauggeräts und Sauggerät
PCT/EP2018/071054 WO2019025566A1 (fr) 2017-08-03 2018-08-02 Procédé de fonctionnement d'un appareil d'aspiration et appareil d'aspiration

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EP3661402B1 true EP3661402B1 (fr) 2025-05-21
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EP (1) EP3661402B1 (fr)
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DE102023106808A1 (de) * 2023-03-17 2024-09-19 J. Wagner Gmbh Handgehaltenes Farbsprühgerät und Verfahren zum Betrieb eines handgehaltenen Farbsprühgeräts

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US11889972B2 (en) 2024-02-06
EP3661402A1 (fr) 2020-06-10
DE102017117684A1 (de) 2019-02-07
US20200163517A1 (en) 2020-05-28
EP3661402C0 (fr) 2025-05-21
WO2019025566A1 (fr) 2019-02-07

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